We had lunch at De Reef one day during our stay. We rented chairs from the gentleman there and hung out near the restaurant most of the day.
The staff had cold drinks ready for us when we wanted them and we took them back to our chairs.
As we were right there it was the obvious choice for lunch. We both had the grilled fish platters. While the fish was a bit overcooked it was still tasty.
We would have gone back to there again during our stay but as it was off season they were only open on the weekend.
All in all it is a great place to spend the day while on the beach at Lower Bay.